Battery for a mobile telephone



FIG. 1 is a front view of the battery for a mobile telephone showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a back side view thereof;

FIG. 5 is a right view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for battery for a mobile telephone, as shown and described. 